Spindle and support or bearing therefor



(No Model.) Y

J. R. GRAY.

SPINDLE AND SUPPORT 0R BEARING THEREFOR.

No. 287,279; Patented Oct. 23, 1883.

UNITE ATENT FFIC...

JAMES It GRAY, OF AYER, ASSIGNOR TO GEORGE DRAPER 8t SONS, OF HOPEDALE,MASSACHUSETTS.

SPIND'LE AND SUPPORT OR BEARING THEREFOR. A

SPECIFICATION forming part of Letters Patent No. 287,279, dated October23,1883.

Application filed Septmber 30. 1882. (No model.)

To aZZ'whom it may concern:

Be it known that 1, JAMES R. GRAY, a citizen of the United States,residing at Ayer, in the county of Middlesex and State of Massachusetts,have invented a new and useful Improvement in Spindles and Supports orBearings therefor; and I do hereby declare that the following is a full,clear, and exact description of the invention, reference being had tothe accompanying drawings, which form a part of this specification.

My invention relates to that class of spindles commonly known as theRabbeth, and has for its objects to provide a construction of spindleand bearing that will allow the spindle to center itself freely whencarrying an unequally-distributed load,without the use or aid of anelastic packing surrounding the bearings, and to reduce the powerrequired to operate this class of spindles. To accomplish these objectsI first provide a bolster-case and bolster-tube similar to those now inuse on the Rabbeth spindle. In the center of the bolstercase I insertand fix a step-board centrally to receive the reduced pintle formed onthe lower end of the spindle, the said step being extended up to a pointsubstantially in the line of the band-pull, and having an internaldiameter a little greater than the diameter of the pintle, thus allowingthe pintle to move laterally in the fixed step. The bolster-tube isconstructed to sleeve the step, fitting it loosely, and is extendedabove the upper end of the step,where it affords'a bearing for the bodyof the spindle above the pintle. The bolster-tube is restrained fromrotation by reason of a pin or projection extended loosely through holesinthebolster-case. Thebolster-tubeisenough smaller in diameterexternally than the chamface outside and inside of it; and it will alsobe noticed that the lateral bearing for the spindle-the upper portion ofthe bolstertubefrom the line of the band-pull upward is alaterally-movable bearing, and that the spin-, dle or its pintle is notrestrained laterally be low the band-pull. In practice the spindle willnot gyrate sufficiently to cause the pintle to touch the upright wall'ofthe step. Extending the wall of the step substantially up to the line ofthe band-pull inside the bolster-tube enables the oil to serve as aninner cushion for the said tube up to the line of the band-pull.

, Referring to the drawings, Figure 1 is a central vertical section of awhirl-sleeve, bolstercase, bolster-tube, and step, with a-portion of thespindle in elevation; and Fig. 2 is a like View of a modification.

In Fig. 1, A is a bolster-case having the fixed step cl, centrallydrilled to receive the pintle formed on the lower end of the spindle B,the pintle being fitted loosely in the step, and the walls of the stepextended upward within the whirl-sleeve to a point nearly in the samehorizontal plane as the band-groove h.

G is a bolster-tube adapted to sleeve the step (Z, fitting it loosely,and extending above the top of the step sufficiently to afford a bearingfor the body of the spindle above the pintle.

The bolster-tube is loosely held and .prevented from rotating by meansof the pin 6. An elastic medium may be interposed between thebolster-tube O and bolster-case A, if desired; but I do not regard it asnecessary or desirable. The oil used to lubricate the spindle forms acushion between the two sufiicient to prevent the communication ofvibration to the spindle.

I do not confine myself to the use .of a bolster-case extending withinthe whirl-sleeve and as far up as the bolster-tube, as I may use abolster case constructed as shown at A, Fig. 2.

Neither do I confine myself to the form of looking pin or projection, asshown, as any other well-known device may be used toprevent the rotationof the bolster-tube.

I claim 1. The spindle having a sleeved whirl, and provided at its lowerend with a reduced pin:

tle, in' combination with the bolster-case, the v as shown,whereby thebolster-tube is adapted to be cushioned, both at its outer and innersides, up to the line of the band-pull, substantially as described.

3. The spindle provided with the sleevewhirl and having a pintle formedat its lower end, the bolster-case, and the centrally-bored step, thewall of which .isextended upwardly into the bolster-tube substantiallyto the line of the band-pull, in combination with the bolster-tubeapplied loosely to the bolster-case and adapted to sleeve the step, andwith a locking pin or projection to restrain the bolster-tube fromrotation with the spindle, yet permit it to slide as the foot of thespindle seeks its true center of rotation, substantially as described.

JAMES R. GRAY.

WVitnesses:

JOHN E. PARsoNs, W. N. CowLEs.

